It is a pleasure to speak in the debate. If there is one attraction to the amendment, it is that it allows a broad-ranging debate on any tax measure one can think of. Perhaps I could talk about the impact that a carrier bag tax would have on small businesses, especially a tax on bags that would allow the biodegradable element to get into the recycling stream, which damages recycling businesses in the plastics industry. That would perhaps stretch the debate a little too far away from the main rate of corporation tax, even though hon. Members might agree on such a measure.
We are going in exactly the right direction in trying to get the main rate of corporation tax down to 20%. That has been the direction of travel for this Parliament and it is the right place to be. I suspect that, if we get it to 20%, that will be the end of the journey, for the very good reason that having a corporation tax rate lower than the basic rate of income tax creates lots of interesting tax planning opportunities, as the previous Government found out when they had a small companies rate of
10%. Lots of strange people incorporated themselves as businesses—they looked a lot like one-man bands who ought to have been self-employed and made interesting tax deferrals or savings when pretending to be companies.
If we get to 20%, that is the end. I suspect that that is why we can no longer have a small companies rate of corporation tax that is lower than the large companies rate. If we lower one rate, we encourage behaviour that we do not want to encourage. It is right that we get both rates down to 20% and to have one rate of corporation tax. We can then scrap the hugely complex marginal relief calculation and everyone will know what rate of tax they pay on their profits. That has to be the right situation. A small growing business, whose profit increases during the year and suddenly hits more than a quarter of a million pounds, will wonder what tax rate it will paying in that year, so losing that whole calculation completely is a huge advantage.